Multiple feed point slot antenna
a multi-channel antenna and antenna technology, applied in the direction of burglar alarm mechanical actuation, instruments, containers, etc., can solve the problem of exposing the pole antenna to damage, and achieve the effect of less expensive, long antenna length and convenient implementation
Inactive Publication Date: 2006-11-09
MINERAL LASSEN
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- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Benefits of technology
This solution enables effective remote communication in containers with improved radiation efficiency and reduced costs, as the slot antenna can be easily integrated into the container, providing better performance for both low-frequency communication and multiple frequency operations.
Problems solved by technology
Additionally, a pole antenna may extend from the container thereby exposing the pole antenna to damage.
Method used
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Embodiment Construction
[0043] The present invention is directed to a device and method of using a slot in a container as an antenna for a wireless communication device. As illustrated in FIGS. 1 and 2, the invention includes a wireless identification device 30, called a “transponder,” that is mounted in a container 10 for identifying the container 10. The container 10 has outer walls 12, including a bottom wall 18, a top wall 19, and outer walls 12 sealed together forming an enclosed chamber for housing a material 16. A rim 14 is formed by the outer wall 12 and may extend above the top wall 19 and the bottom wall 18, for handling the container 10. The outer wall 12 extends upward and curls inward to form the rim 14. The gap between the end of the curled outer wall and the outer wall 12 is called the slot 20 that extends around the circumference of the container 10. A transponder 30 is provided within the rim 14. The transponder 30 may contain information about the container 10 that is communicated to at l...
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A wireless communication device and method for identifying a container, or communication information about a container using a slot in the container as an antenna. The device includes a wireless communication device for transmitting information regarding the container. The container includes an outer wall forming rim and a slot between the rim edge and the outer wall that is circular and continues without boundaries. The wireless communication device is coupled to the slot to provide the slot antenna for communications. An impedance matching network is additionally provided to make the operating frequency of the slot substantially the same as the operating frequency of the wireless communication device. Alternatively, shorting posts may be placed in the slot to define boundaries of the slot to match the operating frequency of the slot to the operating frequency of the antenna. Multiple feed points may be provided between the wireless communication device and the slot.
Description
RELATED APPLICATIONS [0001] The present application is a continuation-in-part of application Ser. No. 09 / 536,334 filed 25 Mar. 2000, entitled “Remote communication using slot antenna”.FIELD OF THE INVENTION [0002] The present invention relates generally to a device and method for identifying a device or article of manufacture such as a container and, more particularly, to a device and method using the slot of the container as an antenna for remote communications. BACKGROUND OF THE INVENTION [0003] It is often necessary to monitor the location and movement of materials within a distribution center or manufacturing facility. One method of tracking the materials is to attach a wireless communication device, such as a radio frequency identification (RFID) transponder or other identification device, to an article of manufacture including any type of physical device or container that houses materials. This application refers to this physical device or article of manufacture as a container...
Claims
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IPC IPC(8): G08B13/14H01Q13/10B65G63/00B65D25/20G06K19/077H01Q1/22H01Q1/44
CPCB65D25/205B65D2203/10G06K19/041G06K19/07749G06K19/07786H01Q13/18H01Q1/2208H01Q1/2225H01Q1/44H01Q13/10H01Q13/12H01Q1/22
Inventor FORSTER, IAN J.HORRELL, PETER ROBERT GEORGE
Owner MINERAL LASSEN